Fontevivo

Researchers are evaluating the effects of felzartamab in adults with Immunoglobulin A nephropathy (IgAN), a kidney disease caused by the buildup of abnormal IgA antibodies in the kidneys. This buildup leads to inflammation and damage, causing protein to appear in the urine. The study aims to understand how felzartamab influences proteinuria and kidney function, while also assessing the safety and how the body processes this treatment. This is a Phase 3, randomized, double-blind, placebo-controlled study focusing on adults with IgAN. Participants will be randomly assigned to receive either felzartamab or a placebo through intravenous (IV) infusions. Neither the participants nor the researchers will know which treatment is given. The treatment period lasts 24 weeks followed by an 80-week follow-up period. In total, participants will attend 17 study visits over about 2 years to receive infusions and participate in study activities. During the study, participants will undergo assessments including urine tests to measure protein levels, kidney function evaluations, and safety monitoring. Researchers will track changes in proteinuria from the start of the study to Week 36 as the main outcome. Additional measurements will include kidney function, clinical endpoints, and the study of how felzartamab is processed by the body. Participant safety and long-term effects will be monitored throughout the study and follow-up periods.